C#关机代码实例详解

C#关机代码是如何执行的呢?那么这段代码主要使用的是P/Invoke技术,如果对这个技术还未有接触,请花一些时间学习一下。P/Invoke不是一个能在一篇帖子里能讲明白的东西。

C#关机代码这段代码实现所用的就是简言之,P/Invoke = Platform Invoke,就是在.NET程序中调用Windows API等非托管函数的技术。

C#关机代码实例:

// 引入必要的命名空间   

 

using System;

using System.Collections.Generic;

using System.ComponentModel;

using System.Data;

using System.Drawing;

using System.Text;

using System.Windows.Forms;

using System.Runtime.InteropServices;  // 提供DllImport等特性,是P/Invoke的关键  //C#关机代码

namespace test

{

    public partial class Form1 : Form

    {

        public Form1()

        {

            InitializeComponent();

        }

        //C#关机代码

        // 这个结构体将会传递给API。使用StructLayout 

        //(...特性,确保其中的成员是按顺序排列的,C#编译器不会对其进行调整。

        [StructLayout(LayoutKind.Sequential, Pack = 1)] 

        internal struct TokPriv1Luid  {  public int Count;  public long Luid;  public int Attr;  } 

        // 以下使用DllImport特性导入了所需的Windows API。 

        // 导入的方法必须是static extern的,并且没有方法体。

        //调用这些方法就相当于调用Windows API。 

        [DllImport("kernel32.dll", ExactSpelling = true)]

        internal static extern IntPtr GetCurrentProcess();

        [DllImport("advapi32.dll", ExactSpelling = true, SetLastError = true)]

        internal static extern bool OpenProcessToken(IntPtr h, int acc, ref IntPtr phtok);

        [DllImport("advapi32.dll", SetLastError = true)]

        internal static extern bool LookupPrivilegeValue(string host, string name, ref long pluid);

        [DllImport("advapi32.dll", ExactSpelling = true, SetLastError = true)]

        internal static extern bool AdjustTokenPrivileges(IntPtr htok, bool disall, ref TokPriv1Luid newst, int len, IntPtr prev, IntPtr relen);

        [DllImport("user32.dll", ExactSpelling = true, SetLastError = true)]

        internal static extern bool ExitWindowsEx(int flg, int rea);

        //C#关机代码 // 以下定义了在调用WinAPI时需要的常数。 //这些常数通常可以从Platform SDK的包含文件(头文件)中找到 

        internal const int SE_PRIVILEGE_ENABLED = 0x00000002;

        internal const int TOKEN_QUERY = 0x00000008;

        internal const int TOKEN_ADJUST_PRIVILEGES = 0x00000020;

        internal const string SE_SHUTDOWN_NAME = "SeShutdownPrivilege";

        internal const int EWX_LOGOFF = 0x00000000;

        internal const int EWX_SHUTDOWN = 0x00000001;

        internal const int EWX_REBOOT = 0x00000002;

        internal const int EWX_FORCE = 0x00000004;

        internal const int EWX_POWEROFF = 0x00000008;

        internal const int EWX_FORCEIFHUNG = 0x00000010;

        // 通过调用WinAPI实现关机,主要代码再最后一行ExitWindowsEx  //这调用了同名的WinAPI,正好是关机用的。

        //C#关机代码

        private static void DoExitWin(int flg)

        {

            bool ok;

            TokPriv1Luid tp;

            IntPtr hproc = GetCurrentProcess();

            IntPtr htok = IntPtr.Zero;

            ok = OpenProcessToken(hproc, TOKEN_ADJUST_PRIVILEGES | TOKEN_QUERY, ref htok);

            tp.Count = 1;

            tp.Luid = 0;

            tp.Attr = SE_PRIVILEGE_ENABLED;

            ok = LookupPrivilegeValue(null, SE_SHUTDOWN_NAME, ref tp.Luid);

            ok = AdjustTokenPrivileges(htok, false, ref tp, 0, IntPtr.Zero, IntPtr.Zero);

            ok = ExitWindowsEx(flg, 0);

        }

        //C#关机代码

        private void button1_Click(object sender, EventArgs e)

        {

            if (radioButton1.Checked == true)

            { DoExitWin(EWX_SHUTDOWN); }

            else { Application.Exit(); }

            //MessageBox.Show("2");

        }

    }

 

}

 

 

 

C#关机代码的实现过程就向你介绍到这里,希望对你了解和学习C#关机代码有所帮助。

C# 关机程序 收藏 1. using System; 2. using System.Runtime.InteropServices; 3. 4. class shoutdown{ 5. [StructLayout(LayoutKind.Sequential, Pack=1)] 6. internal struct TokPriv1Luid 7. { 8. public int Count; 9. public long Luid; 10. public int Attr; 11. } 12. 13. [DllImport("kernel32.dll", ExactSpelling=true) ] 14. internal static extern IntPtr GetCurrentProcess(); 15. 16. [DllImport("advapi32.dll", ExactSpelling=true, SetLastError=true) ] 17. internal static extern bool OpenProcessToken( IntPtr h, int acc, ref IntPtr phtok ); 18. 19. [DllImport("advapi32.dll", SetLastError=true) ] 20. internal static extern bool LookupPrivilegeValue( string host, string name, ref long pluid ); 21. 22. [DllImport("advapi32.dll", ExactSpelling=true, SetLastError=true) ] 23. internal static extern bool AdjustTokenPrivileges( IntPtr htok, bool disall, 24. ref TokPriv1Luid newst, int len, IntPtr prev, IntPtr relen ); 25. 26. [DllImport("user32.dll", ExactSpelling=true, SetLastError=true) ] 27. internal static extern bool ExitWindowsEx( int flg, int rea ); 28. 29. internal const int SE_PRIVILEGE_ENABLED = 0x00000002; 30. internal const int TOKEN_QUERY = 0x00000008; 31. internal const int TOKEN_ADJUST_PRIVILEGES = 0x00000020; 32. internal const string SE_SHUTDOWN_NAME = "SeShutdownPrivilege"; 33. internal const int EWX_LOGOFF = 0x00000000; 34. internal const int EWX_SHUTDOWN = 0x00000001; 35. internal const int EWX_REBOOT = 0x00000002; 36. internal const int EWX_FORCE = 0x00000004; 37. internal const int EWX_POWEROFF = 0x00000008; 38. internal const int EWX_FORCEIFHUNG = 0x00000010; 39. 40. private static void DoExitWin(int flg) 41. { 42. bool ok; 43. TokPriv1Luid tp; 44. IntPtr hproc = GetCurrentProcess(); 45. IntPtr htok = IntPtr.Zero; 46. ok = OpenProcessToken( hproc, TOKEN_ADJUST_PRIVILEGES | TOKEN_QUERY, ref htok ); 47. tp.Count = 1; 48. tp.Luid = 0; 49. tp.Attr = SE_PRIVILEGE_ENABLED; 50. ok = LookupPrivilegeValue( null, SE_SHUTDOWN_NAME, ref tp.Luid ); 51. ok = AdjustTokenPrivileges( htok, false, ref tp, 0, IntPtr.Zero, IntPtr.Zero ); 52. ok = ExitWindowsEx( flg, 0 ); 53. } 54. 55. public static void Main() 56. { 57. Console.WriteLine("正在关机……"); 58. // 修改 EWX_SHUTDOWN 或者 EWX_LOGOFF, EWX_REBOOT等实现不同得功能。 59. // 在XP下可以看到帮助信息,以得到不同得参数 60. // SHUTDOWN /? 61. DoExitWin(EWX_SHUTDOWN); 62. } 63. } 64. 65.
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